EP 0018806 A1 19801112 - An assembly including an airfoil extending between shroud sections and method of making the same.
Title (en)
An assembly including an airfoil extending between shroud sections and method of making the same.
Title (de)
Zwischen einem Innen- und einem Aussenring angeordnete Schaufel und Verfahren zu deren Herstellung.
Title (fr)
Ensemble comprenant une ailette s'étendant entre des jupes et methode pour sa fabrication.
Publication
Application
Priority
US 3618879 A 19790504
Abstract (en)
A turbine engine component (10) having an annular array (17) of airfoils (16) connected with inner (12) and outer (14) shrouds. The airfoils (16) are cast separately from the shrouds (12,14) to enable the airfoils (16) and shrouds (12,14) to be made from either the same or different materials. The airfoils (16) advantageously have an elongated columnar grain structure with grain boundaries extending parallel to the leading (36) and trailing (38) edges of the airfoils (16). The inner (12) and outer (14) shrouds are each formed of a plurality of arcuate sections (18 and 19 respectively) which also may have an elongated columnar grain structure. The ends of the arcuate shroud sections (18,19) are interconnected in such an orientation that the grain boundaries extend circumferentially around the circular shrouds (12,14) to minimize the extent to which ends of the grains are exposed. In another embodiment of the invention, each of the arcuate shroud sections (18,19) is formed of a single crystal. In accordance with a feature of the invention, the forming of a turbine segment (26) which includes a pair of arcuate shroud sections (18,19) and one or more airfoils (16) is facilitated by using a spacer bar (70,72). The spacer bar (70,72) holds the shroud sections (18,19) in a fixed spatial relationship relative to each other while airfoils (16) are connected with the shroud sections (18,19). Once the airfoils (16) have been connected with the shroud sections (18, 19), the spacer bar (70,72) is removed.
IPC 1-7
IPC 8 full level
F01D 5/12 (2006.01); B23P 15/00 (2006.01); C30B 29/52 (2006.01); F01D 9/02 (2006.01); F01D 9/04 (2006.01); F01D 25/00 (2006.01)
CPC (source: EP US)
B23P 15/006 (2013.01 - EP US); F01D 9/042 (2013.01 - EP US); F01D 25/005 (2013.01 - EP US)
Citation (search report)
- US 3724531 A 19730403 - ERICKSON J, et al
- US 3774900 A 19731127 - KUHNERT H
- US 3485291 A 19691223 - PIEARCEY BARRY J
- US 3494709 A 19700210 - PIEARCEY BARRY J
- US 3260505 A 19660712 - VER SNYDER FRANCIS L
- US 1470508 A 19231009 - CHRISTIAN STEENSTRUP
- FR 1188819 A 19590925 - PARSONS & MARINE ENG TURBINE
- FR 1495406 A 19670922 - UNITED AIRCRAFT CORP
- FR 2281511 A1 19760305 - TRW INC [US]
- FR 2136170 A5 19721222 - BBC SULZER TURBOMASCHINEN
- US 3650635 A 19720321 - WACHTELL RICHARD LLOYD, et al
- US 3312449 A 19670404 - CHANDLEY GEORGE D
- US 4157820 A 19790612 - MEUSCHEL DIETER [DE]
- FR 2374508 A1 19780713 - GEN ELECTRIC [US]
- FR 2331678 A1 19770610 - TURBODYNE CORP [US]
Designated contracting state (EPC)
BE CH DE FR GB IT LI SE
DOCDB simple family (publication)
EP 0018806 A1 19801112; EP 0018806 B1 19860730; CA 1141670 A 19830222; DE 3071675 D1 19860904; IL 59741 A0 19800630; IL 59741 A 19840330; JP H0156243 B2 19891129; JP S55148902 A 19801119; US 4464094 A 19840807
DOCDB simple family (application)
EP 80301376 A 19800428; CA 347281 A 19800307; DE 3071675 T 19800428; IL 5974180 A 19800331; JP 1236080 A 19800204; US 3618879 A 19790504